Needless to say, LED leading the lighting industry to the future. 2011 Shenzhen Universiade opening ceremony of the beautiful lighting rendering, dazzling door to the world, star-studded sports venues, amazing, apart from everywhere in embodies the strong vitality of the led power 50w technology and the wonderful prospects.
To meet the Universiade held a green, environmentally friendly concept to the world in March 2011, my unit as a Shenzhen street management department to the downtown area of public tender and the High-tech Zone of Science and Technology Park two LED street lighting demonstration project two key areas in Shenzhen City, a total of 2584 high-pressure sodium lamp, replacement of 40W ~ 180W power LED street lights.
As an emerging industry, technology, processes and selection of led 1w street lamp manufacturers in different ways; countries are also no unified production standards of the LED lights. How to select a suitable product?
To solve this problem, early in 2007 and 2008 comparative field application of the products of multiple manufacturers, and has done a lot of experiments, the large amounts of data, words pour sentence cut in the development of the tender conditions, the stringent requirements, targeted.
First, the evaluation method of integrated assessment. Tenders by the credit standard, business standard, technical standard of three parts, to 0.1,0.45,0.45 the weights, to avoid quality lowest company won the bid.
Secondly, the technical parameters set technical standards review program requirements, the following main aspects:
Chip: chip optical efficiency ≥ 100Lm / W, brands such as Corey and three other well-known brand. Basis for the evaluation of the brand awareness of the chip, model, light efficiency, the average life expectancy, the light fades and other indicators. The most important is the need to provide a chip factory project authorization.
2, the optical index and power factor: (1) the entire lighting efficiency ≥ 75Lm / W parameter the higher the score the more; ② The color temperature of ≤ 6500K; ③ The color rendering index ≥ 65; ④ power factor ≥ 0.92.
(3), with light indicators: (1) the maximum intensity position: horizontal angle C = 10 ° -30 °, vertical angle γ = 50 ° -70 °; ② The half-peak C0/180 plane ≥ 120 ° beam angle: C90/270 plane ≥ 60 °.
4, the light fades: the laboratory 20 hours of continuous bright light decline to ≤ 2.7% or 3000 hours of continuous bright light decline ≤ 3%.
5, electromagnetic compatibility: (1) radio disturbance characteristics meet the GB7000.5 requirements; ② EMC immunity to meet the requirements GB/T18595; (3) input harmonic current to meet the GB17625.1 requirements.
In addition to the chip parameters, the above parameters are required to provide authoritative testing center report.
Third, Warranty: light failure during the warranty period shall be not less than 70%, color temperature drift is less than 8%. Warranty amount of 20% of the contract amount. Warranty period by the commitment of the bidder, the longer the higher the score. The above three areas to ensure only the leading technology, reliable quality, affordable products to the final bid.
After assessment of the expert group on 17 to meet the requirements of the bidding unit, and ultimately successful enterprise, whether the business objectives and technical standards are the highest score, the product is also fully meet the tender requirements.
Hi - Tech Zone led 10w street lighting demonstration project successful products, for example, the chip is a well-known manufacturers products, light efficiency 132Lm / W; 170W lamps entire lighting effects 89.84Lm / W; 3000 hours of continuous bright light is bad for two %. The rest of the parameter indicators are in line with requirements.
Tight construction, the Universiade on the eve of the opening, high-tech region of the downtown area and Technology Park, covered with a milky light the way to 170W of LED lamps to replace the original 250W high pressure sodium lamp. Soft, uniform light green, environmentally friendly concept revealed silently to the Universiade guests.
From 2007 to 2011, five years of development, the LED street lamp industry has made substantial progress, it seems from a toddler into a two-year-old boy. LED street lamp industry is about to enter the stage of the harvest.
I unit vertical from the 2007 trial of led power 10w lights, let's compare then and now the product.
1 chip optical efficiency: Most manufacturers use chips in 2007 luminous efficiency of 70 ~ 80Lm / W, only equivalent to the level of metal halide light effects; 2011 the project won the bid luminous efficiency of the product chip 132Lm / W, has been a considerable level of high pressure sodium.
With light: my 2007 has been tested, most lighting manufacturers aluminum reflectors, but because the light of this LED is directional, in general, uniform irradiation of the actual road Umin value of 0.15 can not be achieved national standards.
2011 products to solve with the problem of light refraction by the lens, the lens can do the refractive index of ≥ 1.58, the transmittance ≥ 88%. At the same time to minimize light loss, improved lighting uniformity, so that installation can be achieved in this respect the level of national standards and more than high pressure sodium.
High Power LED 50W chip, the chip power: most of the 2007 products using less than 0.1W, and in 2011 the majority of chip more than 1W. High-power chips using a direct result of the increase in luminous efficiency.